1) Sweets can be good for people, 'cause they make them feel happier, but if you eat sweets too much, it can be harmful for health
2) We can't say for sure, that all of bitter products ate healthy and good. But in mostly of cases, yes, bitter products make no harm ro the man's health.
3) I like some of bitter products not at all. I eat them when only someone makes me do it.
4) Animals like bitter plants, especially those, who live in a wild nature.